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Subjects
Science CBSE
Class 9
Natural resources
Biogeochemical cycles
3.
Nitrogen and water cycle
Exercise condition:
2
m.
Choose the correct answer
:
1
.
Atmospheric nitrogen conversion to ammonia is known as __________ in the nitrogen cycle.
Denitrification
Condensation
Nitrogen fixation
2
.
The second step in __________ is the conversion of nitrites to nitrates by Nitrobacter.
Assimilation
Nitrification
Ammonification
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